‘If you start suffering from odd electrical faults it’s worth searching for this connector’
Nowadays engines usually have the electrical system supplied in two parts: the engine with a long bundle of cables hanging from it and the control panel with another bundle of cables. They are joined by a multi-way plug that’s often hidden away somewhere.
If you start suffering from odd unexplained electrical faults it’s worth searching along the main wiring harness to locate this connector. Over time, water can get into it causing corrosion and poor connections. The easiest way to cure it is to remove the pairs of faulty connections and join them outside the connector block.
Periodically pull the connector apart and rub Vaseline into the connections, to help waterproof the joint when it is reassembled.
Some engines also have a fuse and holder tucked away beside the harness. Check your boat so that you know if you have one and where it is, ready for the day when some engine electrics suddenly fail to work.